/[MITgcm]/MITgcm/model/src/forward_step.F
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Revision 1.62 - (hide annotations) (download)
Mon Oct 6 20:37:30 2003 UTC (20 years, 8 months ago) by stephd
Branch: MAIN
CVS Tags: checkpoint51h_pre
Changes since 1.61: +10 -3 lines
modification to make gchem more versatile

1 stephd 1.62 C $Header: /u/gcmpack/MITgcm/model/src/forward_step.F,v 1.61 2003/10/02 21:33:54 heimbach Exp $
2 adcroft 1.15 C $Name: $
3 adcroft 1.1
4     #include "CPP_OPTIONS.h"
5 stephd 1.55 cswdptr -- add --
6 heimbach 1.56 #ifdef ALLOW_GCHEM
7     # include "GCHEM_OPTIONS.h"
8 stephd 1.55 #endif
9     cswdptr -- end add ---
10 adcroft 1.1
11 cnh 1.22 CBOP
12     C !ROUTINE: FORWARD_STEP
13     C !INTERFACE:
14 adcroft 1.13 SUBROUTINE FORWARD_STEP( iloop, myTime, myIter, myThid )
15 heimbach 1.12
16 cnh 1.22 C !DESCRIPTION: \bv
17     C *==================================================================
18     C | SUBROUTINE forward_step
19     C | o Run the ocean model and, optionally, evaluate a cost function.
20     C *==================================================================
21     C |
22     C | THE_MAIN_LOOP is the toplevel routine for the Tangent Linear and
23     C | Adjoint Model Compiler (TAMC). For this purpose the initialization
24     C | of the model was split into two parts. Those parameters that do
25     C | not depend on a specific model run are set in INITIALISE_FIXED,
26     C | whereas those that do depend on the specific realization are
27     C | initialized in INITIALISE_VARIA.
28     C |
29     C *==================================================================
30     C \ev
31 adcroft 1.1
32 cnh 1.22 C !USES:
33     IMPLICIT NONE
34     C == Global variables ==
35 adcroft 1.1 #include "SIZE.h"
36     #include "EEPARAMS.h"
37     #include "PARAMS.h"
38     #include "DYNVARS.h"
39 heimbach 1.12 #include "FFIELDS.h"
40    
41 adcroft 1.1 #ifdef ALLOW_NONHYDROSTATIC
42     #include "CG3D.h"
43     #endif
44    
45 jmc 1.27 #ifdef ALLOW_SHAP_FILT
46     #include "SHAP_FILT.h"
47     #endif
48     #ifdef ALLOW_ZONAL_FILT
49     #include "ZONAL_FILT.h"
50     #endif
51    
52 heimbach 1.12 #ifdef ALLOW_AUTODIFF_TAMC
53 heimbach 1.30 # include "tamc.h"
54     # include "ctrl.h"
55     # include "ctrl_dummy.h"
56     # include "cost.h"
57 heimbach 1.37 # include "EOS.h"
58 heimbach 1.30 # ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE
59     # include "exf_fields.h"
60 dimitri 1.45 # if (defined (ALLOW_BULKFORMULAE) || defined (ALLOW_BULK_FORCE))
61 heimbach 1.30 # include "exf_constants.h"
62     # endif
63     # endif
64     # ifdef ALLOW_OBCS
65     # include "OBCS.h"
66     # endif
67 heimbach 1.56 # ifdef ALLOW_PTRACERS
68     # include "PTRACERS.h"
69     # endif
70     #endif /* ALLOW_AUTODIFF_TAMC */
71 heimbach 1.12
72 cnh 1.22 C !LOCAL VARIABLES:
73     C == Routine arguments ==
74 adcroft 1.13 C note: under the multi-threaded model myiter and
75     C mytime are local variables passed around as routine
76     C arguments. Although this is fiddly it saves the need to
77     C impose additional synchronisation points when they are
78     C updated.
79     C myiter - iteration counter for this thread
80     C mytime - time counter for this thread
81     C mythid - thread number for this instance of the routine.
82 heimbach 1.12 integer iloop
83     integer mythid
84     integer myiter
85     _RL mytime
86 dimitri 1.45 #ifdef ALLOW_BULK_FORCE
87 jmc 1.21 INTEGER bi,bj
88 dimitri 1.50 #endif
89 heimbach 1.12
90 cnh 1.22 CEOP
91 heimbach 1.12
92 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
93 heimbach 1.57 IF ( debugLevel .GE. debLevB )
94     & CALL DEBUG_ENTER('FORWARD_STEP',myThid)
95 adcroft 1.53 #endif
96    
97 heimbach 1.12 #ifdef ALLOW_AUTODIFF_TAMC
98 dimitri 1.45 C-- Reset the model iteration counter and the model time.
99     myiter = nIter0 + (iloop-1)
100     mytime = startTime + float(iloop-1)*deltaTclock
101 heimbach 1.12 #endif
102    
103 heimbach 1.32 #if (defined (ALLOW_AUTODIFF_TAMC) && defined (ALLOW_AUTODIFF_MONITOR))
104 dimitri 1.45 C Include call to a dummy routine. Its adjoint will be
105     C called at the proper place in the adjoint code.
106     C The adjoint routine will print out adjoint values
107     C if requested. The location of the call is important,
108     C it has to be after the adjoint of the exchanges
109     C (DO_GTERM_BLOCKING_EXCHANGES).
110     CALL DUMMY_IN_STEPPING( myTime, myIter, myThid )
111 heimbach 1.46 cph I've commented this line since it may conflict with MITgcm's adjoint
112     cph However, need to check whether that's still consistent
113     cph with the ecco-branch (it should).
114     cph CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
115 heimbach 1.16 #endif
116    
117 jmc 1.21 #ifdef EXACT_CONSERV
118     IF (exactConserv) THEN
119     C-- Update etaH(n+1) :
120 heimbach 1.36 CALL TIMER_START('UPDATE_ETAH [FORWARD_STEP]',mythid)
121 jmc 1.35 CALL UPDATE_ETAH( myTime, myIter, myThid )
122 heimbach 1.36 CALL TIMER_STOP ('UPDATE_ETAH [FORWARD_STEP]',mythid)
123 jmc 1.21 ENDIF
124     #endif /* EXACT_CONSERV */
125    
126 jmc 1.18 #ifdef NONLIN_FRSURF
127 jmc 1.48 IF ( select_rStar.NE.0 ) THEN
128     C-- r* : compute the future level thickness according to etaH(n+1)
129     CALL TIMER_START('CALC_R_STAR [FORWARD_STEP]',mythid)
130     CALL CALC_R_STAR(etaH, myTime, myIter, myThid )
131     CALL TIMER_STOP ('CALC_R_STAR [FORWARD_STEP]',mythid)
132     ELSEIF ( nonlinFreeSurf.GT.0) THEN
133     C-- compute the future surface level thickness according to etaH(n+1)
134 heimbach 1.36 CALL TIMER_START('CALC_SURF_DR [FORWARD_STEP]',mythid)
135 jmc 1.21 CALL CALC_SURF_DR(etaH, myTime, myIter, myThid )
136 heimbach 1.36 CALL TIMER_STOP ('CALC_SURF_DR [FORWARD_STEP]',mythid)
137 jmc 1.48 ENDIF
138 jmc 1.21 #endif /* NONLIN_FRSURF */
139 jmc 1.18
140 dimitri 1.45 C-- Load forcing/external data fields.
141 heimbach 1.28 #ifdef ALLOW_AUTODIFF_TAMC
142     c**************************************
143     #include "checkpoint_lev1_directives.h"
144     c**************************************
145 heimbach 1.23 #endif
146 cheisey 1.38
147    
148 heimbach 1.37 C-- Call external forcing package
149 cheisey 1.40 #ifdef ALLOW_BULK_FORCE
150 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
151 jmc 1.58 IF ( useBulkforce ) THEN
152     IF ( debugLevel .GE. debLevB )
153 heimbach 1.57 & CALL DEBUG_CALL('BULKF_FIELDS_LOAD',myThid)
154 adcroft 1.53 #endif
155 cheisey 1.38 CALL TIMER_START('BULKF_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)
156     CALL BULKF_FIELDS_LOAD( mytime, myiter, mythid )
157     CALL TIMER_STOP ('BULKF_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)
158     c calculate qnet and empmr (and wind stress)
159     DO bj=myByLo(myThid),myByHi(myThid)
160     DO bi=myBxLo(myThid),myBxHi(myThid)
161     CALL BULKF_FORCING( bi,bj, mytime, myiter, mythid )
162     ENDDO
163     ENDDO
164     c Update the tile edges.
165     _EXCH_XY_R8(Qnet, mythid)
166     _EXCH_XY_R8(EmPmR, mythid)
167 cheisey 1.43 CALL EXCH_UV_XY_RS(fu, fv, .TRUE., myThid)
168     C _EXCH_XY_R8(fu , mythid)
169     C _EXCH_XY_R8(fv , mythid)
170 heimbach 1.61 END IF
171 jmc 1.58 #endif /* ALLOW_BULK_FORCE */
172 heimbach 1.49 # ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE
173 dimitri 1.45 C NOTE, that although the exf package is part of the
174     C distribution, it is not currently maintained, i.e.
175     C exf is disabled by default in genmake.
176 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
177 heimbach 1.57 IF ( debugLevel .GE. debLevB )
178     & CALL DEBUG_CALL('EXF_GETFORCING',myThid)
179 adcroft 1.53 #endif
180 dimitri 1.45 CALL TIMER_START('EXF_GETFORCING [FORWARD_STEP]',mythid)
181     CALL EXF_GETFORCING( mytime, myiter, mythid )
182     CALL TIMER_STOP ('EXF_GETFORCING [FORWARD_STEP]',mythid)
183 heimbach 1.49 # else /* INCLUDE_EXTERNAL_FORCING_PACKAGE undef */
184     cph The following IF-statement creates an additional dependency
185     cph for the forcing fields requiring additional storing.
186     cph Therefore, the IF-statement will be put between CPP-OPTIONS,
187     cph assuming that ALLOW_SEAICE has not yet been differentiated.
188     # ifdef ALLOW_SEAICE
189 dimitri 1.45 IF ( .NOT. useSEAICE ) THEN
190 heimbach 1.49 # endif
191 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
192 heimbach 1.57 IF ( debugLevel .GE. debLevB )
193     & CALL DEBUG_CALL('EXTERNAL_FIELDS_LOAD',myThid)
194 adcroft 1.53 #endif
195 dimitri 1.45 CALL TIMER_START('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
196     CALL EXTERNAL_FIELDS_LOAD( mytime, myiter, mythid )
197     CALL TIMER_STOP ('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
198 heimbach 1.49 # ifdef ALLOW_SEAICE
199 dimitri 1.45 ENDIF
200 heimbach 1.49 # endif
201     # endif /* INCLUDE_EXTERNAL_FORCING_PACKAGE */
202    
203     #if (defined (ALLOW_ADJOINT_RUN) || defined (ALLOW_TANGENTLINEAR_RUN))
204     c-- Add control vector for forcing and parameter fields
205     if ( myiter .EQ. nIter0 )
206     & CALL CTRL_MAP_FORCING (mythid)
207     #endif
208 cheisey 1.38
209 heimbach 1.49 # ifdef ALLOW_SEAICE
210 dimitri 1.45 C-- Call sea ice model to compute forcing/external data fields. In
211     C addition to computing prognostic sea-ice variables and diagnosing the
212     C forcing/external data fields that drive the ocean model, SEAICE_MODEL
213     C also sets theta to the freezing point under sea-ice. The implied
214     C surface heat flux is then stored in variable surfaceTendencyTice,
215     C which is needed by KPP package (kpp_calc.F and kpp_transport_t.F)
216     C to diagnose surface buoyancy fluxes and for the non-local transport
217     C term. Because this call precedes model thermodynamics, temperature
218     C under sea-ice may not be "exactly" at the freezing point by the time
219     C theta is dumped or time-averaged.
220     IF ( useSEAICE ) THEN
221 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
222 heimbach 1.57 IF ( debugLevel .GE. debLevB )
223     & CALL DEBUG_CALL('SEAICE_MODEL',myThid)
224 adcroft 1.53 #endif
225 heimbach 1.36 CALL TIMER_START('SEAICE_MODEL [FORWARD_STEP]',myThid)
226 jmc 1.41 CALL SEAICE_MODEL( myTime, myIter, myThid )
227 heimbach 1.36 CALL TIMER_STOP ('SEAICE_MODEL [FORWARD_STEP]',myThid)
228 dimitri 1.45 ENDIF
229 dimitri 1.50 # endif /* ALLOW_SEAICE */
230 adcroft 1.15
231 heimbach 1.56 #ifdef ALLOW_AUTODIFF_TAMC
232     # ifdef ALLOW_PTRACERS
233     cph this replaces _bibj storing of ptracer within thermodynamics
234     CADJ STORE ptracer = comlev1, key = ikey_dynamics
235     # endif
236     #endif
237 stephd 1.62
238     #ifdef ALLOW_PTRACERS
239     # ifdef ALLOW_GCHEM
240     CALL GCHEM_FIELDS_LOAD( mytime, myiter, mythid )
241     # endif
242     #endif
243    
244 adcroft 1.15 C-- Step forward fields and calculate time tendency terms.
245 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
246 heimbach 1.57 IF ( debugLevel .GE. debLevB )
247     & CALL DEBUG_CALL('THERMODYNAMICS',myThid)
248 adcroft 1.53 #endif
249 heimbach 1.36 CALL TIMER_START('THERMODYNAMICS [FORWARD_STEP]',mythid)
250 adcroft 1.15 CALL THERMODYNAMICS( myTime, myIter, myThid )
251 heimbach 1.36 CALL TIMER_STOP ('THERMODYNAMICS [FORWARD_STEP]',mythid)
252 jmc 1.35
253     C-- do exchanges (needed for DYNAMICS) when using stagger time-step :
254 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
255 heimbach 1.57 IF ( debugLevel .GE. debLevB )
256     & CALL DEBUG_CALL('DO_STAGGER_FIELDS_EXCH.',myThid)
257 adcroft 1.53 #endif
258 heimbach 1.36 CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
259 jmc 1.35 CALL DO_STAGGER_FIELDS_EXCHANGES( myTime, myIter, myThid )
260 heimbach 1.36 CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
261 jmc 1.24
262     #ifdef ALLOW_SHAP_FILT
263 dimitri 1.45 IF (useSHAP_FILT .AND.
264 jmc 1.27 & staggerTimeStep .AND. shap_filt_TrStagg ) THEN
265 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
266 heimbach 1.57 IF ( debugLevel .GE. debLevB )
267     & CALL DEBUG_CALL('SHAP_FILT_APPLY_TS',myThid)
268 adcroft 1.53 #endif
269 heimbach 1.36 CALL TIMER_START('SHAP_FILT [FORWARD_STEP]',myThid)
270 jmc 1.59 CALL SHAP_FILT_APPLY_TS(gT,gS,myTime+deltaT,myIter+1,myThid)
271 heimbach 1.36 CALL TIMER_STOP ('SHAP_FILT [FORWARD_STEP]',myThid)
272 dimitri 1.45 ENDIF
273 jmc 1.24 #endif
274 jmc 1.27 #ifdef ALLOW_ZONAL_FILT
275 dimitri 1.45 IF (useZONAL_FILT .AND.
276 jmc 1.27 & staggerTimeStep .AND. zonal_filt_TrStagg ) THEN
277 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
278 heimbach 1.57 IF ( debugLevel .GE. debLevB )
279     & CALL DEBUG_CALL('ZONAL_FILT_APPLY_TS',myThid)
280 adcroft 1.53 #endif
281 heimbach 1.36 CALL TIMER_START('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
282 jmc 1.27 CALL ZONAL_FILT_APPLY_TS( gT, gS, myThid )
283 heimbach 1.36 CALL TIMER_STOP ('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
284 jmc 1.27 ENDIF
285     #endif
286 heimbach 1.12
287 dimitri 1.45 C-- Step forward fields and calculate time tendency terms.
288 heimbach 1.61 #ifndef ALLOW_AUTODIFF_TAMC
289 dimitri 1.45 IF ( momStepping ) THEN
290 heimbach 1.61 #endif
291 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
292 heimbach 1.57 IF ( debugLevel .GE. debLevB )
293     & CALL DEBUG_CALL('DYNAMICS',myThid)
294 adcroft 1.53 #endif
295 heimbach 1.36 CALL TIMER_START('DYNAMICS [FORWARD_STEP]',mythid)
296 heimbach 1.12 CALL DYNAMICS( myTime, myIter, myThid )
297 heimbach 1.36 CALL TIMER_STOP ('DYNAMICS [FORWARD_STEP]',mythid)
298 heimbach 1.61 #ifndef ALLOW_AUTODIFF_TAMC
299 dimitri 1.45 ENDIF
300 heimbach 1.61 #endif
301 heimbach 1.12
302 adcroft 1.1 #ifdef ALLOW_NONHYDROSTATIC
303     C-- Step forward W field in N-H algorithm
304 dimitri 1.45 IF ( momStepping .AND. nonHydrostatic ) THEN
305 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
306 heimbach 1.57 IF ( debugLevel .GE. debLevB )
307     & CALL DEBUG_CALL('CALC_GW',myThid)
308 adcroft 1.53 #endif
309 dimitri 1.45 CALL TIMER_START('CALC_GW [FORWARD_STEP]',myThid)
310     CALL CALC_GW(myThid)
311     CALL TIMER_STOP ('CALC_GW [FORWARD_STEP]',myThid)
312     ENDIF
313 adcroft 1.1 #endif
314 jmc 1.18
315     #ifdef NONLIN_FRSURF
316 jmc 1.21 C-- update hfacC,W,S and recip_hFac according to etaH(n+1) :
317 jmc 1.18 IF ( nonlinFreeSurf.GT.0) THEN
318 jmc 1.48 IF ( select_rStar.GT.0 ) THEN
319     CALL TIMER_START('UPDATE_R_STAR [FORWARD_STEP]',myThid)
320     CALL UPDATE_R_STAR( myTime, myIter, myThid )
321     CALL TIMER_STOP ('UPDATE_R_STAR [FORWARD_STEP]',myThid)
322     ELSE
323 dimitri 1.45 CALL TIMER_START('UPDATE_SURF_DR [FORWARD_STEP]',myThid)
324 jmc 1.18 CALL UPDATE_SURF_DR( myTime, myIter, myThid )
325 heimbach 1.36 CALL TIMER_STOP ('UPDATE_SURF_DR [FORWARD_STEP]',myThid)
326 jmc 1.48 ENDIF
327 jmc 1.18 ENDIF
328     C- update also CG2D matrix (and preconditioner)
329 jmc 1.33 IF ( momStepping .AND. nonlinFreeSurf.GT.2 ) THEN
330 dimitri 1.45 CALL TIMER_START('UPDATE_CG2D [FORWARD_STEP]',myThid)
331 jmc 1.18 CALL UPDATE_CG2D( myTime, myIter, myThid )
332 jmc 1.47 CALL TIMER_STOP ('UPDATE_CG2D [FORWARD_STEP]',myThid)
333 adcroft 1.19 ENDIF
334 jmc 1.18 #endif
335 adcroft 1.1
336 jmc 1.27 C-- Apply Filters to u*,v* before SOLVE_FOR_PRESSURE
337     #ifdef ALLOW_SHAP_FILT
338     IF (useSHAP_FILT .AND. shap_filt_uvStar) THEN
339 heimbach 1.36 CALL TIMER_START('SHAP_FILT [FORWARD_STEP]',myThid)
340 jmc 1.27 IF (implicDiv2Dflow.LT.1.) THEN
341     C-- Explicit+Implicit part of the Barotropic Flow Divergence
342     C => Filtering of uVel,vVel is necessary
343 jmc 1.59 CALL SHAP_FILT_APPLY_UV( uVel,vVel,
344     & myTime+deltaT, myIter+1, myThid )
345 jmc 1.27 ENDIF
346 jmc 1.59 CALL SHAP_FILT_APPLY_UV( gU,gV,myTime+deltaT,myIter+1,myThid)
347 heimbach 1.36 CALL TIMER_STOP ('SHAP_FILT [FORWARD_STEP]',myThid)
348 jmc 1.27 ENDIF
349     #endif
350     #ifdef ALLOW_ZONAL_FILT
351     IF (useZONAL_FILT .AND. zonal_filt_uvStar) THEN
352 heimbach 1.36 CALL TIMER_START('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
353 jmc 1.27 IF (implicDiv2Dflow.LT.1.) THEN
354     C-- Explicit+Implicit part of the Barotropic Flow Divergence
355     C => Filtering of uVel,vVel is necessary
356     CALL ZONAL_FILT_APPLY_UV( uVel, vVel, myThid )
357     ENDIF
358 jmc 1.59 CALL ZONAL_FILT_APPLY_UV( gU, gV, myThid )
359 heimbach 1.36 CALL TIMER_STOP ('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
360 jmc 1.27 ENDIF
361     #endif
362 heimbach 1.12
363 adcroft 1.1 C-- Solve elliptic equation(s).
364     C Two-dimensional only for conventional hydrostatic or
365     C three-dimensional for non-hydrostatic and/or IGW scheme.
366 adcroft 1.19 IF ( momStepping ) THEN
367 heimbach 1.36 CALL TIMER_START('SOLVE_FOR_PRESSURE [FORWARD_STEP]',myThid)
368 jmc 1.31 CALL SOLVE_FOR_PRESSURE(myTime, myIter, myThid)
369 heimbach 1.36 CALL TIMER_STOP ('SOLVE_FOR_PRESSURE [FORWARD_STEP]',myThid)
370 adcroft 1.19 ENDIF
371 adcroft 1.1
372 heimbach 1.37 #ifdef ALLOW_AUTODIFF_TAMC
373     cph This is needed because convective_adjustment calls
374     cph find_rho which may use pressure()
375 heimbach 1.51 CADJ STORE totphihyd = comlev1, key = ikey_dynamics
376 heimbach 1.37 #endif
377 adcroft 1.5 C-- Correct divergence in flow field and cycle time-stepping
378 jmc 1.7 C arrays (for all fields) ; update time-counter
379 heimbach 1.12 myIter = nIter0 + iLoop
380     myTime = startTime + deltaTClock * float(iLoop)
381 heimbach 1.36 CALL TIMER_START('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
382 heimbach 1.12 CALL THE_CORRECTION_STEP(myTime, myIter, myThid)
383 heimbach 1.36 CALL TIMER_STOP ('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
384 adcroft 1.5
385 adcroft 1.1 C-- Do "blocking" sends and receives for tendency "overlap" terms
386 heimbach 1.36 c CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
387 jmc 1.7 c CALL DO_GTERM_BLOCKING_EXCHANGES( myThid )
388 heimbach 1.36 c CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
389 adcroft 1.5
390     C-- Do "blocking" sends and receives for field "overlap" terms
391 heimbach 1.36 CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
392 adcroft 1.5 CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
393 heimbach 1.36 CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
394 stephd 1.54
395     cswdptr -- add for seperate timestepping of chemical/biological/forcing
396     cswdptr of ptracers ---
397 heimbach 1.56 #ifdef ALLOW_GCHEM
398 stephd 1.62 #ifdef PTRACERS_SEPARATE_FORCING
399     call GCHEM_FORCING_SEP( myTime,myIter,myThid )
400 stephd 1.54 #endif
401     #endif
402     cswdptr -- end add ---
403    
404 adcroft 1.20
405     #ifdef ALLOW_FLT
406     C-- Calculate float trajectories
407     IF (useFLT) THEN
408 heimbach 1.36 CALL TIMER_START('FLOATS [FORWARD_STEP]',myThid)
409 adcroft 1.20 CALL FLT_MAIN(myIter,myTime, myThid)
410 heimbach 1.36 CALL TIMER_STOP ('FLOATS [FORWARD_STEP]',myThid)
411 adcroft 1.20 ENDIF
412     #endif
413 heimbach 1.12
414     #ifndef EXCLUDE_MONITOR
415     C-- Check status of solution (statistics, cfl, etc...)
416 dimitri 1.45 CALL TIMER_START('MONITOR [FORWARD_STEP]',myThid)
417 heimbach 1.12 CALL MONITOR( myIter, myTime, myThid )
418 heimbach 1.36 CALL TIMER_STOP ('MONITOR [FORWARD_STEP]',myThid)
419 heimbach 1.12 #endif /* EXCLUDE_MONITOR */
420 adcroft 1.1
421 jmc 1.7 C-- Do IO if needed.
422 heimbach 1.36 CALL TIMER_START('DO_THE_MODEL_IO [FORWARD_STEP]',myThid)
423 heimbach 1.12 CALL DO_THE_MODEL_IO( myTime, myIter, myThid )
424 heimbach 1.36 CALL TIMER_STOP ('DO_THE_MODEL_IO [FORWARD_STEP]',myThid)
425 adcroft 1.1
426     C-- Save state for restarts
427 jmc 1.7 C Note: (jmc: is it still the case after ckp35 ?)
428 adcroft 1.1 C =====
429     C Because of the ordering of the timestepping code and
430     C tendency term code at end of loop model arrays hold
431     C U,V,T,S at "time-level" N but gu, gv, gs, gt, guNM1,...
432     C at "time-level" N+1/2 (guNM1 at "time-level" N+1/2 is
433 jmc 1.10 C gu at "time-level" N-1/2) and etaN at "time-level" N+1/2.
434 adcroft 1.1 C where N = I+timeLevBase-1
435     C Thus a checkpoint contains U.0000000000, GU.0000000001 and
436 jmc 1.10 C etaN.0000000001 in the indexing scheme used for the model
437 adcroft 1.1 C "state" files. This example is referred to as a checkpoint
438     C at time level 1
439 heimbach 1.36 CALL TIMER_START('WRITE_CHECKPOINT [FORWARD_STEP]',myThid)
440 adcroft 1.1 CALL WRITE_CHECKPOINT(
441 heimbach 1.12 & .FALSE., myTime, myIter, myThid )
442 heimbach 1.36 CALL TIMER_STOP ('WRITE_CHECKPOINT [FORWARD_STEP]',myThid)
443 adcroft 1.53
444     #ifndef DISABLE_DEBUGMODE
445 heimbach 1.57 IF ( debugLevel .GE. debLevB )
446     & CALL DEBUG_LEAVE('FORWARD_STEP',myThid)
447 adcroft 1.53 #endif
448 adcroft 1.1
449     END

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